Finding the Fourth Proportional to 355.13, 489.92 and 207.68
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Solution
The fourth proportional to 355.13, 489.92 and 207.68 is: 286.50
Step by Step Solution
- Step 1: Write the proportion equation
355.13 : 489.92 = 207.68 : x - Step 2: Convert to fraction form
355.13/489.92 = 207.68/x - Step 3: Cross multiply
355.13x = 489.92 × 207.68 - Step 4: Simplify right side
355.13x = 101,743.10 - Step 5: Solve for x
x = 101,743.10/355.13 - Step 6: Final answer
x = 286.50
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.